Why it works: Sugar and flour are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 92,116 recipes. Both carry phenylacetaldehyde, which smells hawthorne, honey. The science ↓
Hot Water Sponge Cake
Ingredients
Directions
The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Preheat the oven to 350°F (175°C).
Make the batter
In a bowl, cream the egg yolks and powdered sugar thoroughly.
Gently fold in the beaten egg whites.
Add the flour and stir well.
Gradually stir in the boiling water.
Pour the batter into a greased cake pan and bake for about 35 minutes.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Photo for illustrative purposes only · Contact us to use it
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + eggtop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
Egg and flour barely smell alike, yet cooks put them together in 106,462 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eggs
- Whipped whites trap air and give the sponge its light, airy structure.
- Flour
- Provides the starch and gluten network that sets the cake's crumb structure.
- Powdered sugar
- Sweetens the batter and helps the creamed eggs hold a smooth, stable texture.
- Baking powder
- Releases gas in the batter, helping the cake rise in the oven.
- Boiling water
- Adds moisture and loosens the batter, producing a tender crumb.
The step that matters
Gently fold in the beaten egg whites. Whipped whites hold the air that makes a sponge rise. Stirring or deflating them vigorously knocks out that air, leaving a dense, flat cake.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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